3) Find a vector function r(t) that represents the intersection of the surfaces: z = √√√x² + y² z = y + 1

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A: Use seperate the variable

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A: We are required to: Determine the point (x,y) on the unit circle associated with the angles=7π4.

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Q: What is the sum of the first 9 terms of the sequence -4, 12, -36, 108...? A B C -39,364 -19,684…

A: the terms are -4,12,-36,108..... find the sum of the first 9 terms ?

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